Question

According to Fajans' rules, ionic bonds are formed when cations have a:

• A. low positive charge and large size
• B. low positive charge and small size
• C. high positive charge and large size, and anions have a small size
• D. low positive charge and large size, and anions have a small size

Answer 1

The correct option is D low positive charge and large size, and anions have a small size

According to Fajan's rule, a larger cation with less positive charge has more ionic character due to its low polarizing power whereas, an anion with a smaller size has more ionic character due to its low polarizability.